Science and technology

Associated Press
This screen shot shows the website of the U.S. Sentencing Commission after it was hijacked by the hacker-activist group Anonymous, early Saturday, Jan. 26, 2013, to avenge the death of Aaron Swartz, an Internet activist who committed suicide. The website of the commission, an independent agency of the judicial branch, was replaced with a message warning that when Swartz killed himself two weeks ago "a line was crossed." (AP Photo)

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